Amplifier



Oct. 18,1927.

J. L. BROWN AMPLIFIER Filed May 4. 1926 2 Sheets-Sheet M VEWZ'OI? mrwzss BY M W -7 Arra/M Y Oct. 18, 1927. ,050 J. L. BROWN AMPLIFIER Filed May 4. 1926 -2 Sheets-Sheet 2 W/f/VEJS: 4 W41 4/0/97 1 firawn Patented a. 1a, 1927.

' UNITED-Y STATE-SI.

PATENT OFFICE.

J'OHNL. snowmor snnmnmirnm, rnnnsvtvmm, ASSIGNOB To run roomy comm, or rnmnnnrnm, PENNSYLVANIA, a conroaarron or rnnnsnvmm.

Application filed I Kay 4,

My invention relates to horns or amplien a born or am lifier .is built into'a- 'I of similar home or amplifiers heretofore v known. Further objects of my invention are to provide a horn, of superior qualities and of a structure capable of variation for the production of des red results.

Having now indicated, in a general way, the nature and purposeof my inventiom'I will proceed to a detailed description thereof with reference to the accompanying in in which there is illustrated a preferred embbdiment and in which-:

Fig. Iris a perspective view of an ampl1-' fier embodying my invention in associationv with a portion of a cabinet illustrated diagrammatically.

Fig 2 is a cross sectional view of the amplifier shown in'Fig. 1. r

Fig. 3 is a rear view o'fthe amplifier shown in Figs. land 2.

Fig. 4 is a lan view'ofan amphfier embodylng a m ificat'ion of my invention." Fig. is a side view of the amplifier shown in Flg. 4.

Fi 6 isa. rear view of the amplifier shown inF1 .4and5.

Re erring more particularl to Figs. 1-3 a indicates a phonograph ca inet provided with partitions b, 12 between which is formed a chamber f r the amplifier to be presently described in detail. Supported from the partition b is a record support or turn-table 0, adjacent to which is draw- I AMPLIFIER 1926. Serial No. 106,602.

The amplifier comprises-a pair of horns having adjacent chambers f, f, the top,-bottom and side walls of which converge from the open forward, or delivery, end of the chambers to an opening at the rear end ofthe bottoms of the chambers. v The convergence ofthe side walls of the chambers results in the formation of a V-shaped space 9 between the horns.

tioned a block h, having formed. within it a pair of conduits i, e' in communication re spectively 'with' the openings in the bottoms of, the horns and with a common opening 1'.

formed in the block and opening into the V-shape'd space 9. Supported in the block and in communication with the o ening j is a conduit is, which extends-vertically in the space'g and communicates atits upper end with the tone arm d. A p v The conduit is is so formed as to enlarge fromits upper to its'lower end, while .the conduits i, 5 starting from the opening are each so formed as to enlarge toward the openings in the bottoms of the chambers f, f and it will be noted that, while the conduits i, i at the opening j are each approximately one-half of the size of the opening j, they are each the same size as-the openin vj at their points of communication with the chambers, f, f of the horns.

It will now be observed the amplifier from the oint of communication of the conduit is with tone, arm d to the result in increased volume and more perfecttone at the delivery ends of the chambers.

Referring now to Figures P6, the structure of the amplifier is similar to that of Figures 1-3, except that the block h is placed on the tops of the chambers f, f of the horns, the tops of which are provided with 0 enings within which the conduits i, i in b ock that the length of .65 .Beneath the rear end of the horns is posik communicate, and that in place of the .conduit k there is provided a conduit 1, which is adapted to communicate at one end with the tone arm (1 and which extends downwardly, around and upwardly, in space g, into communication with opening 7' in'block h.

It will be noted that the amplifier shown in Figs. 46 is of greatly increased length, but that it does not occupy any additional space over that required for the accommodation of the chambers f,'f of the horns, the increased length being obtained by utilization of the V shaped spaced formed between thehorns.

While I have described my invention more particularly in relation to a horn or amplifier in association with a phonograph, 1t Wlll be understood that my invention is equally applicable to horns or amplifiersfor use "in connection with radio apparatus or with a combination of radio apparatus and phonograph. Y

Having now fully described my invention, what I claim and desire to protect by Letters Patent is 1. An amplifier having a pair of horns each tapering from the front to the rear thereof, there being an inlet opening leading into each of said horns at the rear thereof between the backs and fronts of the horns, atone arm between the horns at the rear thereof, and having an outlet opening, and a conduit extending from each horn inlet opening to the outlet opening from.

the tone arm, said conduits lying between the backs and fronts'of the horns.

2. An amplifier having a pair of horns each tapering from the front to the rear thereof, there beingan inlet opening leading into each of said horns at the rear thereof between the backs and fronts of the horns, a tone arm Between the horns at the rear thereof, and having an outlet opening, and a tapered conduit extending from each horn inlet opening to the outlet opening from the tone arm, said conduits lying between the backs and fronts of the horns.

3. An amplifier having a pair of horns each tapering from the front to the rear thereof, there being an inlet opening leading into each of said orns at the rear thereof between the backs and fronts ofthe horns,

a tapered tone arm between the horns at the.

rear thereof, and having an outlet opening,

and a tapered conduit extending from each horn inlet opening to the outlet opening from the tone arm, said conduits lying between the backs and fronts of the horns.

4. An-amplifier having a pair'of horns each tapering from the front to the rear thereof, there being an inlet opening lead ing-into each of said horns at the rear thereof between the backs and fronts of the horns, a tone arm between the horns at the rear thereof, and having an outlet opening,

and a tapereda'ndreversely curved conduit extending from each horn inlet opening to the outlet opening from the tone arm, said conduits lying between the backs and fronts of the horns.

5. An amplifier having a pair of horns each tapering from the front to the rear thereof, there being an inlet opening leading into each of said horns at the rear thereof between the backs and fronts of the horns, a tapered tone arm between the horns at the rear thereof, and having an outlet opening, and a tapered and reversely curved conduit extending from each horn inlet opening to the outlet opening from the tone arm, said condults lying between the back I and fronts of the horns.

-6. An amplifier having a pair of horns each tapering from the front to the rear thereof, there being an inlet opening leading substantially at right angles to the axes of the horns, while'the conduits extend substantially at right angles to the axis of the tone arm and the axes of the horns. v

. In testimony of which invention, I have hereunto set my hand, at Philadelphia,

Pennsylvania, on this 1st day of May, 1926.

JOHN L. BROWN. 

